Spaceland is a science fiction novel by American mathematician and computer scientist Rudy Rucker, and published in 2002 by Tor Books.

On the New Year's Eve before the new millennium, trying to impress his wife Jena, he brings home a prototype of his company's new product (a TV screen that turns standard television broadcasting into a 3D image).

The upside potential becomes much clearer for Joe once Momo "augments" him, by helping him grow a new eye on a 4D stalk, giving him the power to see in four-dimensional directions, as well as the ability to see into our dimension using a four-dimension perspective.

Strange Horizons felt that Joe's adventures were "thought-provoking", and compared the book positively to Ian Stewart's Flatterland, but faulted it for lacking in mathematical rigor.

[2] Publishers Weekly called it "a hilarious tribute (to Flatland);[3] Kirkus Reviews, however, found it to be "not funny, not fascinating" and "for fans only",[4] and the Notices of the American Mathematical Society—while conceding that it "is a fun read"—emphasized its shortcomings, including that Rucker is too repetitive and didactic, and that the characters are "one-dimensional (pardon the pun)".